dennis murphy (voiceover): it was may 5, 2014. at the head of the driveway, >> it was may 5th, 2014. the car was at the head of the driveway, lights on, and two county detectives arriving to try to figure out what had happened to the young woman dead in the driver seat. detective mike ryan and captain steve welker, in the first minutes of what would be a years-long investigation. >> blake and i arrived at the same time. >> did the scene explain itself to you? >> we could see the basics of what had happened. >> their victim, brandy daniels, had been shot three times at close range. crime scene techs would recover three shell casings and a clip for semiautomatic pistol. her phone and purse were beside her. >> we took out robbery because there was money that they would've taken if it was a robbery. >> as csis took pictures, they gathered blood, and dna. brandy's mom, sister and fiancÉe watched in blank horror. >> what do you remember? >> sitting in her vehicle behind the car, just watching. >> and there's your girl, gone. >> there is

here is dennis murphy with "unspeakable". >> the scented candles were lit.acuzzi jets turned on high. it was a belated anniversary evening, but not some big blowout. sandra and jaime were just not that kind of couple. >> there were so kind to each other, so respectful. >> it was really the start of a life victory lap for the two. they raised a daughter, did all the usual things that families do, and now the time for jamie was right around the corner -- >> they sat there and talked about the future and what they were looking forward to. >> but the future for these two would last no longer than the flame on that candle. by the next afternoon, there would be blood, lots of it. somehow, someone had turned a cozy celebration into a monstrous crime scene. >> it was just -- it was horrible. >> but in the world have happened in that house? >> i have no idea. >> the story of the two begins as high school me cute. sandra, the new girl from morocco, assigned a seat and her classroom just in front of jamie melgar. their daughter doesn't know how many times she heard tha

here's dennis murphy with "at the edge of town".tspoken lovely was finding her voice. >> i am not trying to point fingers or assign blame. we just want answers. >>reporter: the investigation appeared to be over, but lovely refused to give up. >> this is not over. >> no, this is not over. >>reporter: she filed a lawsuit against the city of carbondale and its police chief, accusing them of negligence. >> 12 days after the boy's family filed a lawsuit against you, you are fired? >> yes. it was actually over the weekend. >> so 30 years of law enforcement work goes up in smoke. >> yes, that was pretty much the end of my career. >> the city says his dismissal was a confidential matter with nothing to do with litigation. but the chief says that he was the scapegoat for city under siege from pravin's family. >> what did you think of the investigation until that point? >> what i did think was it was a good investigation. there were a lot of conscientious people working hard. >>reporter: there was one other person that lovely sued. remember,

dennis murphy (voiceover): the camera kind of. always liked karen pannell. both hard to miss and hard to forget, just ask her the camera always liked karen pannell. she was both hard to miss and hard to forget. just ask her boyfriend tim permenter, who was smitten right away when he met her at the dealership where he worked. what did you think of her? >> she was gorgeous, she was beautiful. >> you were pinching yourself. you thought you were the luckiest guy. >> i thought she was the one. i thought she was the one i could settle down with. >> settling down hadn't been part of karen's growing up. she and her five brothers had been raised as military brats and moved bases a lot. now they were traveling from far flung parts of the country for her funeral. shocked and in mourning for the lost sister who had always been their glue. >> all the boys kind of got involved in their own stuff. then there was karen. she was really what connected all of us to the family unit. >> what does that tell us about her? >> she was really more important to us than we knew. i thin

dennis murphy: investigators looking into the murder >> investigators looking into the murder of hannah logs to the doorstep of 20 year old denny ross. denny, it turned out, was a friend of hannah's boyfriend, brad. the kids knew denny as a host at a nonstop hunt funhouse and crash pride. where do you surprise hannah was hanging around with that crowd? >> no. i mean, we hung out with people that didn't do some great stuff. but i guess we just kind of thought it was -- not that it was okay but we were doing it, so i guess we were pretty naive, too. >> denny was days into probation on a drug charge and asked to have his lawyers present when detectives arrive for a conversation. once the lawyers showed up, detectives took out a tape recorder and began an interview. >> would you say your full name, sir? >> denny, frederik cross. >> then he told it attempt if he stayed in the night hannah disappeared. but then volunteered and a stall issuing bit of information. >> was there anybody here at the house with you? >> had a stopover for a little bit. >> hannah stopped over wednesday evening? -ing.

dennis murphy (voiceover): who had bound, gagged, and bludgeoned to death ben novack jr.?o had bound, gagged, and bludgeoned to death ben novack jr.? >> the scene was overwhelming. just thinking, oh my god. >> in this case, the detectives -- victim-ology would play a big role. finding out who the murdered person was, as well as the people in a circle of friends, his enemies. >> this is the address here? >> detective allison carpentier along with detective nelson would piece together an unflattering family portrait. >> in the beginning we didn't know if this is an affair, domestic, and random act? >> they cavill together the story of ben jr.. the while the son of a famous miami beach man with his eccentric batman collection. the wife from modest beginnings, the stepdaughter welcomed late to the family circle. >> we're still learning the dynamics of the family, how may was a stepchild. it took some time to learn about the family. >> the novak's came like the cast from a bad reality show. but good old fashion robbers were number one in the homicide. >> a lot of guys don't lik

dennis murphy (voiceover): september 1, 2013. september 1st, 2013. it was 6 am. murder case, was now assigned. he was just finishing his graveyard shift and heading back to the station, when he noticed a car in the back of the road. it looked like a stranded motorist. derek stop to help, but never made it out of his car. >> the motorist had a gun. and he was angry. >> police chief, brian roberts. >> and he fired at derek johnson while sitting in the driver seat of his car. >> derek, wounded, trying to drive away. but lost control and drove head on into a tree. he died at the scene. >> it was hard. yeah it sucked. you have to give me a second. so derek, he was a good guy. good cop. good friend. >> derek was just 32 years old. leaving behind his wife, and six-year-old son, and his family at draper pd. >> everybody talks about a cops a cop. and the best cop you can have. and how we treated and serve to the community. derek was one of those guys. >> for jacqueline moore, the loss was twofold. >> he was starting to get some free time to help me with the case, and tell

here's dennis murphy with the sting. >> the mesmerizing story of dalia, with a fittingly preposterous ending, begins in a place where conspicuous consumption and the envy index are as high as the humidity. palm beach, florida. >> it is the winter wonderland of the wealthy. you can drive over the bridge and immediately feel the rarefied air. the mentions, the hedges. >> palm beach post senior editor jan tuckwood, says some mainlanders can't resist the want to be a lot of palm beach. >> most people on the mainland are influenced. that richness is right there. and how can they get a piece to piece of it? >> over the bridge, past the interstate, newlyweds dalia and mike dippolito lived in a quarter million dollar condo in high and dry boynton beach. not exactly the same zip code as palm beach. but perfectly fine for two up and comers. dalia and mike had big dreams like any couple young and in love. aspiration. she had a 20,000 dollar diamond engagement ring. he had a porsche in the garage. their story for public consumption, the g rated version, was love at first sight. michael is an inte

dennis murphy (voiceover): mona wehde's son dustin had been shot dead.dd up. >> mona's son dustin had been shot dead. and she knew that tracey roberts story did not add up. but it was a conversation with the town's funeral director that made her think, tracy might be deliberately be misleading police. that she had something to hide. >> they told me that dustin was shot. three times in this under arm. two times in his hip. and at that point, four times in the back of his head. and i went, what? >> the violence of dustin's death overwhelmed her. mona now believe not only did tracey's story of self-defense was bogus. not only that her son was innocent of any crime the night of the home invasion. she also believed that austin had been murdered, targeted. >> so this is an execution he walks into? is that the way you see it? >> totally. >> but years after the attack, she felt as if there was no want to listen to her. >> i felt like my hands were tied because i could not do the investigation. i could not do anything. and i was so sad, because my son and his fil

dennis murphy: when did the whispers start? immediately.